RE: Inspiration, Re: More on UPS issues

["DeLong, Eric" <EDeLong@xxxxxxxxxxxxxxx>]

James,

I guess I don't understand what you are trying to circumvent......  The low
battery warning signal was sent by the UPS because your batteries are fried.
Once you replace the batteries, the unit should NOT send the low battery
signal until the batteries run out of power.  On a properly functioning UPS,
the normal sequence would be

1. power interuption
2. ups signals BATTERY POWER
3. time goes by
4. power is restored, UPS signals UTILITY POWER 
     OR
5. batteries weaken, UPS signals LOW BATTERY
6. AS400 sees that the UPS is still on battery power and the batteries are
running out, so it initiates an immediate shutdown to protect the system
from power failure.

Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: James H. H. Lampert [mailto:jamesl@xxxxxxxxxxx]
Sent: Wednesday, January 07, 2004 9:46 AM
To: Midrange Systems Technical Discussion
Subject: Inspiration, Re: More on UPS issues


How about this:

A short adapter cable (DB9M on one end, DB9F on the other, ribbon cable
between. I sever the "low battery" line, and cut in a normally-closed
reed relay, held open by a small "wall wart.") If the UPS fails a
self-test, the "wall wart" is still powered, holds the relay open, and
blocks the low battery warning, but if the power really goes down, the
relay falls closed, and any low battery warning gets through.

-- 
James H. H. Lampert
Professional Dilettante
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